My opinion would be you cannot use ductile since, even though this pipe is going to be underground, it is essentially a part of the aboveground system and a dry system at that so you are restricted to approved pipe types. Of course you don't want to directly bury steel pipe, galvanized or not, in direct earth contact. I'd take a note from the gas fitters that used a pre-wrapped or site-wrapped black steel pipe. There's a spec on how thick the plastic is (10 mil I think) but that can be found in the UPC. As to low point drain is your buried below the frost line you don't need to worry about the pipe down there although I'd drain it anyways since you'll need to drain the ends that are above that line. To do this I'd suggest a digging a small, lined dry well (maybe 6" by 24" deep) wherever you're planning a drain. Fill this with gravel. Bring a keyed valve (like the ones for lawn sprinklers) to the well and surround it with a road box.
On 4/17/07, Margaret Zabel <[EMAIL PROTECTED]> wrote:
Re: my previous post about a dry standpipe installation, I believe that the large pipe was all standard-type underground pipe: ductile iron as I recall. The much smaller connection for the drain may have been handled with some specially lined 2" pipe for the drain. There is a company in southern California somewhere (Santa Fe Springs?) which will cement-line steel pipe for you on a custom basis. I have used their services on government-only jobs in the past where function was more important than listing. This job I am referring to was for the county in which the airport is located. Since we needed only about 5' of small pipe, we may have done something else. I don't remember. (Guess I'd make a good politician....) Margaret Zabel --- Roland Huggins <[EMAIL PROTECTED]> wrote: > the use of underground steel pipe is restricted, see > 10.1.2. One can > argue about whether it applies just to supply mains > (since it came > out of NFPA 24) since 8.16.4.2.4 addresses it. > Transitioning WITHIN > a sprinkler system (ie after the system riser), has > never been well > defined. Skate on out there on that thin (unknown) > ice. > > Roland > > On Apr 17, 2007, at 2:05 PM, Reed Roisum wrote: > > > I've got a outdoor amphitheatre that needs > sprinkler protection. The > > only option allowed to get from the controls > (adjacent heated > > building) > > to the arch on the amphitheatre is to go > underground. We will be > > using > > galvanized pipe for the dry system for the > amphitheatre. > > > > The question is what pipe should I spec for the > dry underground? Can > > (should) I use galvanized? Do you sleeve it? Any > other suggestions? > > > > Thanks, > > > > > > Reed Roisum > > Fire Protection Technician > > > > Ulteig Engineers, Inc. > > 3350 38th Avenue South > > Fargo, ND 58104-7079 > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > To Unsubscribe, send an email to:Sprinklerforum- > > [EMAIL PROTECTED] > > (Put the word unsubscribe in the subject field) > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
-- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
